Script to automatically update cloudflare ip blocklist
I wrote a script to update an ip blocklist in cloudflare. Even free cloudflare can have 1 free ip list. My script pulls down the emerging threats ip list, grep out the ip and then posts each one via the cloudflare iplist api.
You can adapt this script to retrieve ips from your fail2ban jail and then send them to cloudflare for block.
Feel free to adapt as you see fit